Next to my Camera and lenses this would probably be the most valuable tool I have. Its not glamourous, and its probably not the most elegant thing in the world, but if you want to nail exposure its a must! An interesting side note, this photograph was taken with no lighting other than a tungsten ceiling light. The illumination came from the display itself, and the rest was a 30 second exposure with the camera mounted on a sturdy tripod. Funny thing is I used the camera to set the exposure NOT the lightmeter. 😛